John clark



i (No Model.)

J. CLARK.

OLE-ARER FOR PIPES. No. 283,205. Patented Aug. 14, 1883.

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WITNESSES: INVENTOR:

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UNITED STATES PATENT OFFICE;

JOHN'CLABK, or NEW YonK, N. Y.

,CLEARER FOR PIPETSQ" SPECIFICATION forming" part of Letters Patent No. 283,205, dated August 14,1883,

Application filed April 21, 1883. (No model.)

To all whom it may concern..-

Be it known that I, JOHN CLARK, ofthe city county, and State of New York, have invented a new and usefulImprovement in Clearers for Stand-Pipes of GasWVorks and other Pipes, of which the following is a full, clear,

and exact description.

Reference is to be hadto the accompanying drawings, forming a part of this specification,

improvement, illustrating its use.

in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a sectional side elevation of. my Fig. 2 is a side elevation of the same.

Theobject of this invention is to facilitate the removal of the carbon deposited upon the inner surfaces of the standpipes of gas-works.

The invention consists in apipe-clear'er made with a cutter having central perforation to re :ceive a rod, which is provided with collars above and below the cutter, to adapt the said rod to serve as a hammer to force the cutter through the pipe. The rod is also provided with a cap to keep it in the center of the pipe while the tool is being used, as will be hereinafter fully described.

A represents a cutter, which is made cupshaped, and of such a diameter at its edge as to fit into the pipe I? to be cleared of carbon. The bottom of the cutter A is made thick, and is perforated to receive the rod B, which is made of such. a length as to extend through the stand-pipe P, and of such a size as will give it sufficient weight to serve as a hammer for forcing the cutter through the said pipe. Upon the rod B, above and belowthe cutter I A, and at such a distance apart as will give the rod sufficient movement for a blow, are

welded or otherwise secured two collars, OD,

and upon the upper end of the said rod is se- 40 cured athird collar, E.

Upon the upper part of the rod B, between the collars D E, is placed a cap, F, to fit upon the upper end of the pipe P, and serve as a" guide to center the said rod in the said pipe when the tool is being used.

I In using the tool the cutter Ais inserted in the upper end of the pipe P, and the rod B is moved up and down, the weight of the said rod causing the collar D, as it strikes the bot tom of the cutter A, to serve as a hammer to force the said cutter through the pipe.

When the tool is to be withdrawn, the collar 0 serves as a hammer for driving the cut ter A out of the pipe.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1.. A pipe-clearer made substantially as 

